A strange thing about char array and a request

Projects Programming
1

I have a char array that is filled with the request to a server ,

in the first option which is the same as the second, it WORKS :

 int total_len=0;  
          int id=0;
          char cmd[64];
          char *hdr[] =
          { 
             "GET /index.php HTTP/1.1\r\nHost:XX.X1.XXX.1X\r\nUser-Agent:runscope/0.1\r\nContent-Type:application/json\r\nConnection:close\r\n\r\n\r\n", 
             NULL
          };

          total_len=0;
          for(int i=0; hdr[i]!=NULL; i++)  // get total length of data to send
            total_len+=strlen(hdr[i]);
         
           // set channel and length of transfer
          sprintf(cmd,"AT+CIPSEND=%d,%d",id,total_len); 
          wifiSerial.println(cmd);
          
            // wait for '>' and send data
          if( waitFor( ">", 5000 ) ) 
          {
            for(int i=0; hdr[i]!=NULL; i++)
              wifiSerial.print(hdr[i]);

In the second which is exactly the same, but the request array is looks like this :

 char *hdr[] =
          { 
            "GET /index.php HTTP/1.1\r\n ",
            "Host:xx.xx.xxx.xx\r\n ", 
            "User-Agent:runscope/0.1\r\n ",
            "Content-Type:application/json\r\n ",
            "Connection:close\r\n\r\n\r\n", 
             NULL
          };

they print the same but only the first is working.On the second i get bad request because its structure is not good. Why ?

2

Wrong assumptions are "which is exactly the same" and (not even) "they print the same".

In the second variant you added blanks (' ' 0x20) to the end of the line,
which will end up as first characters of the next field/line.